I'm with you regarding bases, John. I especially like providing stability for pieces that might otherwise tip over.
I'll even add a wider base to a casting that already has one. For example, Gammage cast some of his figures with an integral rectangular base. But it's so narrow front to back, that the figure would tip over at the slightest bump to the shelf. Some older Tradition castings have a similar base. I'll attach those to a wider square base, for stability. I've got some civilian pieces by Sanderson, Hecker & Goros, and others, too, that were intended to be inserted into a diorama, so, they are cast with no base. I have to add bases for them, and I can make them relatively uniform.
I've also dressed some bases up with a little putty for ground work, where appropriate.
Prost!
Brad